Name ________________________________________ Class _________________ Date _______________
MIXTURES
2.2
SECTION REVIEW
Objectives
• Categorize a sample of matter as a substance or a mixture
• Distinguish between homogeneous and heterogeneous samples of matter
Key Terms
• mixture
• heterogeneous mixture
• homogeneous mixture
• solutions
• phase
• distillation
Part A Completion
Use this completion exercise to check your understanding of the concepts and terms
that are introduced in this section. Each blank can be completed with a term, short
phrase, or number.
A physical combination of two or more substances is a
1
. 1.
A mixture has a variable composition and may be identified as
2
3
2.
4
3.
and have uniform properties. Any part of a system with uniform
4.
or
. Homogeneous mixtures are known as
composition and properties is called a
5
.
Many mixtures can be separated into their
methods.
7
5.
6
by physical
is a method of separation involving boiling and
6.
7.
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re-condensation of a liquid.
Part B True-False
Classify each of these statements as always true, AT; sometimes true, ST; or never true, NT.
________ 8. Homogeneous mixtures can be separated by distillation.
________ 9. A solution has a uniform composition.
________ 10. A heterogeneous mixture contains two or more phases.
________ 11. A phase contains a single substance.
Review Module / Chapters 1–4
31
Name ________________________________________ Class _________________ Date _______________
Part C Matching
Match each description in Column B to the correct term in Column A.
Column A
Column B
________ 12. mixture
a. a mixture that has a completely uniform composition
________ 13. heterogeneous mixture
b. any part of a system that has uniform composition and
properties
________ 14. homogeneous mixture
c. a mixture which is not uniform in composition
________ 15. solution
d. separation of a liquid solution by boiling and recondensation
________ 16. phase
e. a special name for a homogeneous mixture
________ 17. distillation
f. a physical blend of two or more substances
Part D Questions and Problems
Answer each of the following questions in the space provided.
18 State whether each of the following is a homogeneous or heterogeneous
mixture.
a. oxygen dissolved in water
a.
b. carbon mixed with sand
b.
c. filtered apple juice
c.
d. vegetable soup
d.
e. fresh squeezed lemonade
e.
32
a. sugar (sucrose)
a.
b. hot tea
b.
c. salt (sodium chloride)
c.
d. vinegar
d.
Review Module / Chapters 1–4
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19. Classify each of the following as a substance or a mixture.